We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
912
Radio Broadcast
counter-clockwise. If turned clockwise it will jam.
Holes reamed in this manner are very smooth and have little taper.
IN THE article on charging storage B batteries in the June RADIO BROADCAST, mention was made of the discrepancy between a hot wire meter and a d.c. meter in a common charging circuit. The a.c. meter will always give the higher reading, and a statement was advanced that this reading was to be preferred as being the more nearly correct value of the current flowing. This is erronious. The hot wire meter registers the root mean square or heating value of the current, and the d.c. meter the average value of the current. An electrolytic process, such as that functioning in a storage battery during charge, varies with the average current. That is, a two ampere charge applied for one hour, off for one hour, on for one hour, etc., is equivalent in electrolytic effect to that obtained by applying a one ampere charge continuously for the total length of time of the intermittent charge. It can be shown that in a pulsating current, the r.m.s. value is always higher than the average value.
In almost every other case where measurements are desired of a pulsating current, it is the r.m.s. value that should be observed.
.BEGiNING ENCyx\ BEGINING
x . . r ^
GRID COIL SECONDARY
PLATE COIL (TICKLER)
COILS WOUND IN SAME DIRECTION
FIG. 6
How to connect your tickler coil for regeneration, in accordance with simple rules set forth in this article. "A" will regenerate. "B" will rot.
r I ^HE material appearing in this magazine is fully protected by copy•* right, and editors of periodicals are advised that unauthorized publication of circuit diagrams, technical descriptions, and parts or the whole of articles, without due permission and credit, is an infraction of the law. Those who wish to reprint material appearing in these pages are asfed to communicate with the editor.